It's so amazing. My sister and I had been wondering if moving joints was possible, and here they are! Now we're just waiting to see if you can do what we're trying to figure out: shoulder blades that shift and move when you walk (the way an animals shoulderblades move, of course)
Have you ever thought of making stilts for the back feet...so you don't have to use padding as much and it gives the body a less squished look.
I doubt you could do the wrist joint with the back leg stilts, but it would still look awesome. :3